package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page =dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 新增菜品和对应的口味
     * @param dishDTO
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
     //向菜品表插入数据
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
     dishMapper.insert(dish);
     //获取insert语句生成的主键id值
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
     if (flavors!=null&&flavors.size()>0){
         flavors.forEach(dishFlavor -> {
             dishFlavor.setDishId(dishId);
         });
         //向口味表拆入n条数据
     dishFlavorMapper.insertBatch(flavors);
     }
    }

    /**
     * 菜品的批量删除
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否存在起售中
        for (Long id : ids) {
          Dish dish=  dishMapper.getById(id);
          if (dish.getStatus()== StatusConstant.ENABLE){
              //菜品处于起售中
              throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
          }
        }
        //判断当前菜品是否被套餐关联
        List<Long> setmealId =  setmealDishMapper.getSetmealIdByDIshIds(ids);
        if (setmealId!=null&&setmealId.size()>0){
            //当前菜品被套餐关联了 不允许删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);

        }
        //删除菜品中的菜品数据
     /*   for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除菜品中的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }*/
//根据菜品id批量删除
        dishMapper.deleteByIds(ids);
        //根据菜品id批量删除关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);

    }

    /**
     * 根据id查询菜品数据以及口味数据
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWidthFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish=dishMapper.getById(id);
        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);
        //封装到vo中
        DishVO dishVO =new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return  dishVO;
    }

    /**
     * 修改菜品数据以及口味数据
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
     //修改菜品基本信息
     Dish dish =new Dish();
     BeanUtils.copyProperties(dishDTO,dish);
     dishMapper.update(dish);
     //删除原有的口味基本信息
     dishFlavorMapper.deleteByDishId(dishDTO.getId());
     //插入新的口味数据
     List<DishFlavor> flavors =dishDTO.getFlavors();
        if (flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表拆入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品停售、起售
     * @param status
     * @param id
     */
    @Override
    @Transactional
    public void startOrStop(Integer status, Long id) {
        Dish dish=Dish.builder().id(id)
                .status(status).build();
        dishMapper.update(dish);
        if(status==StatusConstant.DISABLE){
            //如果要停售 需要将包含该菜品的套餐也停售
            List<Long> dishIds =new ArrayList<>();
            dishIds.add(id);
            List<Long> setmealIds =setmealDishMapper.getSetmealIdByDIshIds(dishIds);
            if(setmealIds!=null&&setmealIds.size()>0){
                for (Long setmealId : setmealIds) {
                    Setmeal setmeal =Setmeal.builder().id(setmealId).status(StatusConstant.DISABLE).build();
                    setmealMapper.update(setmeal);
                }
            }
        }
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish =Dish.builder().categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
